Understanding TRIR and DART

TRIR (Total Recordable Incident Rate) counts all OSHA-recordable injuries and illnesses per 100 full-time equivalent workers. An OSHA-recordable incident is any work-related injury or illness that results in days away from work, restricted work, job transfer, medical treatment beyond first aid, loss of consciousness, or diagnosis of a significant illness by a healthcare professional.

DART (Days Away, Restricted, or Transferred Rate) is a subset of TRIR that counts only the more severe incidents — those resulting in days away from work, job restrictions, or job transfers. A lower DART relative to TRIR suggests less-severe incidents overall.